diff options
Diffstat (limited to 'sound/spi/at73c213.c')
| -rw-r--r-- | sound/spi/at73c213.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/sound/spi/at73c213.c b/sound/spi/at73c213.c index 89d6e9c35140..09802e8a6fb8 100644 --- a/sound/spi/at73c213.c +++ b/sound/spi/at73c213.c @@ -118,7 +118,7 @@ static struct snd_pcm_hardware snd_at73c213_playback_hw = { .rates = SNDRV_PCM_RATE_CONTINUOUS, .rate_min = 8000, /* Replaced by chip->bitrate later. */ .rate_max = 50000, /* Replaced by chip->bitrate later. */ - .channels_min = 2, + .channels_min = 1, .channels_max = 2, .buffer_bytes_max = 64 * 1024 - 1, .period_bytes_min = 512, @@ -133,7 +133,8 @@ static struct snd_pcm_hardware snd_at73c213_playback_hw = { static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) { unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); - unsigned long dac_rate_new, ssc_div, status; + unsigned long dac_rate_new, ssc_div; + int status; unsigned long ssc_div_max, ssc_div_min; int max_tries; @@ -209,7 +210,13 @@ static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) { struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; + int err; + /* ensure buffer_size is a multiple of period_size */ + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) + return err; snd_at73c213_playback_hw.rate_min = chip->bitrate; snd_at73c213_playback_hw.rate_max = chip->bitrate; runtime->hw = snd_at73c213_playback_hw; @@ -228,6 +235,14 @@ static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { + struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); + int channels = params_channels(hw_params); + int val; + + val = ssc_readl(chip->ssc->regs, TFMR); + val = SSC_BFINS(TFMR_DATNB, channels - 1, val); + ssc_writel(chip->ssc->regs, TFMR, val); + return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); } @@ -249,10 +264,12 @@ static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) ssc_writel(chip->ssc->regs, PDC_TPR, (long)runtime->dma_addr); - ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2); + ssc_writel(chip->ssc->regs, PDC_TCR, + runtime->period_size * runtime->channels); ssc_writel(chip->ssc->regs, PDC_TNPR, (long)runtime->dma_addr + block_size); - ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); + ssc_writel(chip->ssc->regs, PDC_TNCR, + runtime->period_size * runtime->channels); return 0; } @@ -314,15 +331,6 @@ static struct snd_pcm_ops at73c213_playback_ops = { .pointer = snd_at73c213_pcm_pointer, }; -static void snd_at73c213_pcm_free(struct snd_pcm *pcm) -{ - struct snd_at73c213 *chip = snd_pcm_chip(pcm); - if (chip->pcm) { - snd_pcm_lib_preallocate_free_for_all(chip->pcm); - chip->pcm = NULL; - } -} - static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) { struct snd_pcm *pcm; @@ -334,7 +342,6 @@ static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) goto out; pcm->private_data = chip; - pcm->private_free = snd_at73c213_pcm_free; pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; strcpy(pcm->name, "at73c213"); chip->pcm = pcm; @@ -375,7 +382,8 @@ static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) ssc_writel(chip->ssc->regs, PDC_TNPR, (long)runtime->dma_addr + offset); - ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); + ssc_writel(chip->ssc->regs, PDC_TNCR, + runtime->period_size * runtime->channels); retval = IRQ_HANDLED; } @@ -737,7 +745,7 @@ cleanup: /* * Device functions */ -static int snd_at73c213_ssc_init(struct snd_at73c213 *chip) +static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip) { /* * Continuous clock output. @@ -767,7 +775,7 @@ static int snd_at73c213_ssc_init(struct snd_at73c213 *chip) return 0; } -static int snd_at73c213_chip_init(struct snd_at73c213 *chip) +static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip) { int retval; unsigned char dac_ctrl = 0; @@ -933,7 +941,7 @@ out: return retval; } -static int snd_at73c213_probe(struct spi_device *spi) +static int __devinit snd_at73c213_probe(struct spi_device *spi) { struct snd_card *card; struct snd_at73c213 *chip; |